I may be way off here but i have a theory about this thats at least worth considering. When i did my AI on my cal bike with EVLS i was one of those who had the starting/warmup problem. But it soon went away and i tried to figure out what it was i did that changed that. Just the other day in fact an idea hit me about this. When i ordered the AI kit i also ordered the carb balancer. I did the AI first and now i'm thinking that when you remove the AI and plug that carb vaccum port, it may upset the carb balance. When i finally did the carb balancing it was way off. The question is, was it after that when the problem disappeard? It's been a while so i can't say for sure. But up till now i figured it went away about the time i installed my pipes. But now looking back it could have been after i balanced the carbs.
So i may be wrong, but in short i'm thinking that plugging the vaccum port after AI removal throws the carb balance off which causes the start/warmup problem, and balancing them after that fixes it. Worth considering at least.
